Miele PWM 912 SI Installations Plan page 36

en - Installation notes
Payment device
36
It is particularly important to observe manufacturer's instructions
when using a combination of cleaning agents and special application
products.
The washing machine can be fitted with a single-machine payment
system as an optional accessory via the Connector Box.
The programming required for connecting a payment system can be
carried out during the initial commissioning process. After initial com-
missioning, changes may only be carried out by your Miele dealer or
the Miele Customer Service Department.